au.net.aba.crypto.provider
Class DES
java.lang.Object
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+--javax.crypto.CipherSpi
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+--au.net.aba.crypto.provider.BlockCipher
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+--au.net.aba.crypto.provider.DES
- Direct Known Subclasses:
- DESede
- public class DES
- extends BlockCipher
A class that provides DES encryption.
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Field Summary |
static java.lang.String |
ident
|
protected int[] |
Kn1
|
protected int[] |
work
|
| Fields inherited from class au.net.aba.crypto.provider.BlockCipher |
BLOCK_SIZE,
buffer,
bufferPos,
CBC,
cbcNextV,
cbcV,
ECB,
firstBlock,
ident,
ivec,
ivEncrypted,
ivInline,
key,
mode,
paddedStream,
random,
streamMode |
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Constructor Summary |
DES()
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Method Summary |
protected int |
decryptBlock(byte[] in,
int inOff,
int len,
byte[] out,
int outOff)
Decrypt the given block starting at the given offset and place
the result in the provided buffer starting at the given offset. |
protected void |
desfunc(int[] block,
int[] keys)
the DES engine. |
protected int |
encryptBlock(byte[] in,
int inOff,
int len,
byte[] out,
int outOff)
Encrypt the given block starting at the given offset and place
the result in the provided buffer starting at the given offset. |
protected void |
prepareKeys(int opMode,
byte[] key,
int[] keys)
prepare the key for whatever processing we are planing. |
protected void |
scrunch(byte[] outof,
int offset,
int[] into)
pack 8 bytes from outof into 2 ints. |
protected void |
setKey(java.security.Key key)
Re-key the cipher. |
protected void |
unscrunch(int[] outof,
byte[] into,
int offset)
extract 8 bytes from the 2 ints in outof. |
| Methods inherited from class au.net.aba.crypto.provider.BlockCipher |
engineDoFinal,
engineDoFinal,
engineGetBlockSize,
engineGetIV,
engineGetOutputSize,
engineGetParameters,
engineInit,
engineInit,
engineInit,
engineSetMode,
engineSetPadding,
engineUpdate,
engineUpdate,
reset |
| Methods inherited from class java.lang.Object |
clone,
equals,
finalize,
getClass,
hashCode,
notify,
notifyAll,
toString,
wait,
wait,
wait |
ident
public static final java.lang.String ident
work
protected int[] work
Kn1
protected int[] Kn1
DES
public DES()
setKey
protected void setKey(java.security.Key key)
throws java.security.InvalidKeyException
- Description copied from class: BlockCipher
- Re-key the cipher. If the provided Key is not compatible
with this cipher the exception should throw an InvalidKeyException.
- Overrides:
- setKey in class BlockCipher
encryptBlock
protected int encryptBlock(byte[] in,
int inOff,
int len,
byte[] out,
int outOff)
throws IllegalBlockSizeException
- Description copied from class: BlockCipher
- Encrypt the given block starting at the given offset and place
the result in the provided buffer starting at the given offset.
The input will be an exact multiple of our blocksize.
- Overrides:
- encryptBlock in class BlockCipher
decryptBlock
protected int decryptBlock(byte[] in,
int inOff,
int len,
byte[] out,
int outOff)
throws BadPaddingException
- Description copied from class: BlockCipher
- Decrypt the given block starting at the given offset and place
the result in the provided buffer starting at the given offset.
The input will be an exact multiple of our blocksize.
- Overrides:
- decryptBlock in class BlockCipher
prepareKeys
protected void prepareKeys(int opMode,
byte[] key,
int[] keys)
- prepare the key for whatever processing we are planing.
Acknowledgements for this routine go to James Gillogly & Phil Karn.
(whoever, and wherever they are!).
scrunch
protected void scrunch(byte[] outof,
int offset,
int[] into)
- pack 8 bytes from outof into 2 ints.
unscrunch
protected void unscrunch(int[] outof,
byte[] into,
int offset)
- extract 8 bytes from the 2 ints in outof.
desfunc
protected void desfunc(int[] block,
int[] keys)
- the DES engine.